CN207868990U - It is a kind of for electric installation - Google Patents
It is a kind of for electric installation Download PDFInfo
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- CN207868990U CN207868990U CN201820040776.XU CN201820040776U CN207868990U CN 207868990 U CN207868990 U CN 207868990U CN 201820040776 U CN201820040776 U CN 201820040776U CN 207868990 U CN207868990 U CN 207868990U
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Abstract
The utility model discloses a kind of for electric installation, for solving the problems, such as that design difficulty for electric installation circuit of reversed excitation is big, power supply efficiency is low.This includes for electric installation：Input unit is connected with the output end of external DC/AC power supply source；The output of the output end and alternating current-direct current switch unit of output unit input terminal and circuit of reversed excitation connects, and output end is connect with power receiving device, for powering for power receiving device；The output end of alternating current-direct current switch unit, input terminal and input unit connects, and output end is connect with the input terminal of the input terminal of circuit of reversed excitation and output unit respectively, for switching power supply between circuit of reversed excitation and output unit；If input unit output is alternating current, be connected between the output end of alternating current-direct current switch unit and the input terminal of circuit of reversed excitation, if input unit output is direct current, be connected between the output end of alternating current-direct current switch unit and the input terminal of output unit；The input terminal of circuit of reversed excitation, output end and output unit connects, the voltage for converting input.
Description
Technical field
The utility model is related to power technique fields, more particularly to a kind of for electric installation.
Background technology
With the continuous development of the communication technology, communication equipment is also towards diversified trend development.But various communications are set
The otherness of standby usage scenario is larger, and the power type being capable of providing is also different, wherein including alternating current, i.e. alternating current, has
Source Ethernet (Power Over Ethernet, PoE) power supply etc..
In order to simply be adapted to the electric power thus supplied of these different scenes, usually used means are equipped with one and hand over directly
Circulate changer adapter, to meet the application under different scenes.Refer to Fig. 1, Fig. 1 is a kind of knot for electric installation in the prior art
Structure schematic diagram.In Fig. 1, direct current be (direct current, DC) and alternating current be (alternating current,
AC it is) to share an input interface, 2pin power supply terminals as shown in Figure 1.With DC it is 12V in Fig. 1, for AC is 24V, respectively
Illustrated with DC12, AC24.AC24/DC12 after rectifier bridge by be combined diode, to prevent the power supply after POE rectifications
Pour in down a chimney, then accesses isolated circuit of reversed excitation, the output+12V voltages after the DC-DC of circuit of reversed excitation transformation.
Due to AC24/DC12 by rectifier bridge all after be also required to by circuit of reversed excitation, this allows for the input of circuit of reversed excitation
Voltage range is more wide in range.And the input voltage range of circuit of reversed excitation is more wide in range, circuit of reversed excitation design difficulty is bigger, therefore existing
Have in technology, the design difficulty of circuit of reversed excitation greatly increases.In addition when DC12 powers, identical power, and when voltage is relatively low,
Electric current is larger, therefore, when DC12 powers, the power device for including inside circuit of reversed excitation, such as rectifier diode, transformer,
Field-effect transistor equal loss is larger, generates heat also than more serious, power supply efficiency is very low.
As it can be seen that the design difficulty in the prior art for electric installation circuit of reversed excitation is larger, and power supply efficiency is very low.
Utility model content
The utility model embodiment offer is a kind of for electric installation, existing in the prior art for electric installation flyback for solving
The design difficulty of circuit is larger, and the low-down technical problem of power supply efficiency.
The utility model embodiment provides a kind of for electric installation, this includes for electric installation：
Input unit is connected with the output end of external DC/AC power supply source；
The output connection of the output end of output unit, input terminal and circuit of reversed excitation and alternating current-direct current switch unit, output end with
Power receiving device connects, for powering for the power receiving device；
Alternating current-direct current switch unit, input terminal are connect with the output end of the input unit, output end respectively with circuit of reversed excitation
Input terminal connected with the input terminal of the output unit, between the circuit of reversed excitation and the output unit switch supply
Electricity；Wherein, if input unit output is alternating current, output end and the flyback electricity of the alternating current-direct current switch unit
It is connected between the input terminal on road, if input unit output is direct current, the output end of the alternating current-direct current switch unit
It is connected between the input terminal of the output unit；
The circuit of reversed excitation, output end are connect with the input terminal of the output unit, the voltage for converting input.
Optionally, the alternating current-direct current switch unit includes：
Four detection units, wherein the input terminal of each detection unit in four detection units and the input
The output end of unit connects, and is alternating current or direct current for detect the input unit output；
Four switching circuits, wherein the input terminal of each switching circuit in four switching circuits is correspondingly connected with one
The output end of a detection unit, for the detection unit export be alternating current when, be connected the detection unit with
Connection between the circuit of reversed excitation, detection unit output be direct current when, conduction detection unit and the output
Connection between unit.
Optionally, the detection unit is the combinational circuit of resistance-inductance-capacitance RLC.
Optionally, each switching circuit is transistor and/or analog switch, if each switching circuit is crystal
Pipe, then the alternating current-direct current switch unit further includes：
The first diode being connected with each other and the first load so that described when what the detection unit exported is direct current
The value of the voltage of output unit output is the first preset value；
Wherein, the anode of first diode connects with the collector of the first switch circuit in four switching circuits
It connects, the cathode of first diode is connect with one end of first load, the other end and described four of first load
The collector of second switch circuit in a switching circuit connects；The first switch circuit and the second switch circuit exist
It is connected when what the detection unit exported is direct current.
Optionally, the alternating current-direct current switch unit further includes：
Second load so that when what the detection unit exported is alternating current, the value of the voltage of the output unit output
For the second preset value；
The 5th switching circuit being connect with the third switching circuit in four switching circuits；Wherein, third switch electricity
Road the detection unit export be alternating current when be connected, the collector of the 5th switching circuit with it is described second load
One end connects；
It connect the 6th switching circuit with the 4th switching circuit in four switching circuits；Wherein, the 4th switching circuit
The detection unit output be alternating current when be connected, the collector of the 6th switching circuit with it is described second load it is another
One end connects；
Second diode is connect with the 5th switching circuit, wherein the anode and the described 5th of second diode
The collector of switching circuit connects, and the cathode of second diode is connect with the ground level of the third switching circuit；
Third diode is connect with the 6th switching circuit, wherein the anode and the described 4th of the third diode
The input terminal of switching circuit connects, and the cathode of the third diode is connect with the output end of the 4th switching circuit.
Optionally, the alternating current-direct current switch unit further includes：
7th switching circuit, first detection unit and second detection unit in input terminal and four detection units
Input terminal connects, and output end connect with the collector of the first switch circuit, be used for input unit two input terminals and
When the output end Opposite direction connection of the DC/AC power supply source, the output unit can be that the power receiving device is powered.
Optionally, the alternating current-direct current switch unit further includes：First phase shifter and the second phase shifter；
Wherein, first phase shifter is connect with the 4th switching circuit and the 6th switching circuit, and described second
Phase shifter is connect with the 4th switching circuit and the 8th switching circuit, is alternating current for what is exported in the input unit
When so that the alternating current-direct current switch unit can export continuous alternating current.
Optionally, the input unit includes first interface and second interface, described to further include for electric installation：
Rectifier bridge is connect with the alternating current-direct current switch unit and the circuit of reversed excitation；
Wherein, the input terminal of the first interface is connected with the output end of the DC/AC power supply source, output end with
The input terminal of the rectifier bridge connects, and the output end of the rectifier bridge is connect with the input terminal of the circuit of reversed excitation；
The input terminal of the second interface is connect with active Ethernet PoE power supplies, output end and the rectifier bridge
Input terminal connects, and the output end of the rectifier bridge is connect with the input terminal of the circuit of reversed excitation, for being supplied for PoE power receiving devices
Electricity.
Increase alternating current-direct current switch unit for electric installation in the utility model embodiment, the alternating current-direct current switch unit it is defeated
Outlet is connect with the input terminal of the input terminal of circuit of reversed excitation and output unit respectively, can be between circuit of reversed excitation and output unit
Switching power supply.What it is when input unit output is alternating current, then the output end of alternating current-direct current switch unit and the circuit of reversed excitation is defeated
Enter and be connected between holding, realizes Alternating Current Power Supply.When input unit output be direct current, then the output end of alternating current-direct current switch unit with
It is connected between the input terminal of output unit, realizes direct current supply.In this way when input unit output be direct current when, can be without
Circuit of reversed excitation is crossed, but is directly output to output unit, so that the input voltage range of circuit of reversed excitation only passes through input
Alternating current determines, reduces the range of input voltage, also reduces the design difficulty of circuit of reversed excitation.And since input unit exports
Be direct current when, can will not change without circuit of reversed excitation, voltage, will not increase so as to cause electric current, solve
Larger, the low technical problem of power supply efficiency is lost in power device caused by electric current increases.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram for electric installation that the prior art provides；
Fig. 2 is another structural schematic diagram for electric installation that the prior art provides；
Fig. 3 is a kind of structural schematic diagram for electric installation that the utility model embodiment provides；
Fig. 4 is a kind of structural schematic diagram for the alternating current-direct current switch unit that the utility model embodiment provides；
Fig. 5 is the realization circuit diagram for the direct current electricity output that the utility model embodiment provides；
Fig. 6 is the realization circuit diagram for the exchange electricity output that the utility model embodiment provides；
Fig. 7 is a kind of structural schematic diagram for electric installation inverse plugging that the utility model embodiment provides；
Fig. 8 exports discontinuous schematic diagram for what the utility model embodiment provided for electric installation alternating current；
Fig. 9 exchanges a kind of electricity output continuously structural representation for what the utility model embodiment provided for electric installation inverse plugging
Figure.
Specific implementation mode
To make the purpose of this utility model, technical solution and advantage be more clearly understood, below in conjunction with the utility model
Attached drawing in embodiment, the technical scheme in the utility model embodiment is clearly and completely described.
In the prior art, larger for the design difficulty of electric installation circuit of reversed excitation, this allow for the volume of circuit of reversed excitation just compared with
Greatly, it is difficult to reach light demand.And it is in the prior art very low for electric installation power supply efficiency.
For this purpose, referring to Fig. 2, Fig. 2 is another structural schematic diagram for electric installation that the prior art provides.Fig. 2 passes through
Alternating current-direct current detection circuit is set to drive relay, by relay-switch, and then controls the switching of input power, works as input
For AC24 when, be directly connected to AC24V current rectifying and wave filtering circuits, be then connected to the input terminal (not illustrating in Fig. 2) of circuit of reversed excitation again.When
When input is DC12, be directly connected to the output of circuit of reversed excitation, i.e. isolation output, and require no rectifier bridge and DC-DC circuit.This
Sample would not make the range of the input voltage of circuit of reversed excitation increase, and can also solve the problems, such as inefficiency when DC12 power supplies.
But power supply is switched over using relay, since to will appear spike existing for electric current, i.e., suddenly increase, this just needs to increase electricity
Suppression circuit is flowed, and relay is mechanical contact type device, service life is very limited.In addition, low power relay work(
Consumption is restricted, and the relay volume of big power consumption is larger, it is difficult to realize demand light for electric installation, small.
Alternatively, can also be by realizing the switching of power supply with an AC relay.Because of the induction of AC relay
Magnetic field is square directly proportional to magnetic flux, so only can just be acted when accessing AC24, that is to say, that exchange relay
Device can be directly realized by the function such as the alternating current-direct current detection circuit in Fig. 2.But the volume bigger of AC relay, price also compare
It is more expensive, therefore it is more difficult to realize demand light for electric installation, small.
In consideration of it, alternating current-direct current switch unit is increased for electric installation in the utility model embodiment, alternating current-direct current switching
The output end of unit is connect with the input terminal of the input terminal of circuit of reversed excitation and output unit respectively, can be in circuit of reversed excitation and output
Switch power supply between unit.What it is when input unit output is alternating current, then the output end of alternating current-direct current switch unit and the flyback
It is connected between the input terminal of circuit, realizes Alternating Current Power Supply.What it is when input unit output is direct current, then alternating current-direct current switch unit
It is connected between output end and the input terminal of output unit, realizes direct current supply.In this way when input unit output be direct current when,
Can be without circuit of reversed excitation, but it is directly output to output unit, so that the input voltage range of circuit of reversed excitation is only led to
The alternating current for crossing input determines, reduces the range of input voltage, also reduces the design difficulty of circuit of reversed excitation.And due to input
When what unit exported is direct current, it can will not change without circuit of reversed excitation, voltage, will not increase so as to cause electric current
Greatly, it solves the power device caused by electric current increases and larger, the low technical problem of power supply efficiency is lost.
The technical solution of the utility model embodiment offer is provided with reference to the accompanying drawings of the specification.
Refer to Fig. 3, the utility model embodiment provides a kind of for electric installation, this includes for electric installation：Input unit,
Output unit, alternating current-direct current switch unit and circuit of reversed excitation.Wherein, input unit can be defeated with external DC/AC power supply source
Outlet is connected.The output end of the input terminal of output unit and input unit connects, the output end of output unit can with by electricity
Device connects, for powering for power receiving device.Power receiving device is not shown in Fig. 3.The input terminal of alternating current-direct current switch unit is single with input
The output end connection of member, the output end of the alternating current-direct current switch unit input terminal with the input terminal of circuit of reversed excitation and output unit respectively
Connection, for switching power supply between circuit of reversed excitation and output unit.Wherein, it if input unit output is alternating current, hands over
It is connected between the output end of direct current switch unit and the input terminal of circuit of reversed excitation, if input unit output is direct current, hands over
It is connected between the output end of direct current switch unit and the input terminal of output unit.The output end of circuit of reversed excitation and output unit it is defeated
Enter end connection, the voltage for converting input.
The voltage signal of reception is exported to alternating current-direct current and is cut by the power supply of external DC/AC power supply source by input unit
Unit is changed, the voltage signal that identification input unit is exported is detected by alternating current-direct current switch unit, if it is alternating current, then handing over
Direct current switch unit can be connected between the output end of alternating current-direct current switch unit and the input terminal of circuit of reversed excitation.If input
Unit output is direct current, then alternating current-direct current switch unit can make the output end and output unit of alternating current-direct current switch unit
Input terminal between be connected.In this way when input unit output be direct current when, can without circuit of reversed excitation, but directly it is defeated
Go out to output unit, so that the input voltage range of circuit of reversed excitation is only determined by the alternating current of input, reduces input
The range of voltage also reduces the design difficulty of circuit of reversed excitation.And due to input unit output be direct current when, can be without
Circuit of reversed excitation is crossed, voltage will not change, and will not increase so as to cause electric current, solve the work(caused by electric current increases
Rate device loss is larger, the low technical problem of power supply efficiency.
In order to make to can adapt to more application scenarios for electric installation, continuing with referring to Fig. 3, the utility model embodiment
In, input unit may include first interface and second interface, and in possible embodiment, the first interface of input unit includes
But DC out-put supply plugs are not limited to, second interface includes but not limited to that standard socket (Registered Jack, RJ) 45 connects
Mouthful, to ensure interface generality, in Fig. 3 by taking first interface is 2pin power supply terminals as an example, for second interface is 45 interfaces of RJ
Illustrated.
Can also include rectifier bridge for electric installation.Wherein, rectifier bridge can be with the alternating current-direct current switch unit and described anti-
Excitation circuit connects.The input terminal of the first interface is connected with the output end of the DC/AC power supply source, output end and institute
The input terminal connection of rectifier bridge is stated, the output end of the rectifier bridge is connect with the input terminal of the circuit of reversed excitation.I.e. direct current and
Alternating current shares an interface, realizes supplied by AC/DC electricity.The input terminal of the second interface can be with active Ethernet (Power
Over Ethernet, PoE) power supply connection, output end connect with the input terminal of the rectifier bridge, the rectifier bridge it is defeated
Outlet is connect with the input terminal of the circuit of reversed excitation, for powering for PoE power receiving devices.In this way in the utility model embodiment
Power over Ethernet is provided for electric installation, and is integrated with supplied by AC/DC electricity, is adapted to different electrical power power supply, more flexibly.
The voltage signal for inputting alternating current-direct current switch unit can not only be identified in above-mentioned alternating current-direct current switch unit, may be used also
With after the voltage signal of identification input alternating current-direct current switch unit by the output end of alternating current-direct current switch unit and circuit of reversed excitation or defeated
Go out unit connection.In possible embodiment, Fig. 4 is referred to, introduces a kind of realization method of alternating current-direct current switch unit.
As shown in figure 4, alternating current-direct current switch unit may include：Four detection units and four switching circuits, it is each to detect
Unit corresponds to a switching circuit, and a detection unit and a switching circuit form switching channels all the way.Wherein, four detections
The input terminal of each detection unit in unit and the output end of input unit connect, and are to hand over for detect input unit output
Galvanic electricity or direct current.The input terminal of each switching circuit of four switching circuits is correspondingly connected with the output end of a detection unit,
For detection unit export be alternating current when, the connection between conduction detection unit and circuit of reversed excitation is defeated in detection unit
When what is gone out is direct current, the connection between conduction detection unit and output unit.Two terminals of input unit are separately connected often
The input terminal of a detection unit.The output end of each two switching circuit forms direct current or alternating current.
In order to make it easy to understand, continuing with referring to Fig. 4, in Fig. 4, two terminals of input unit be AC+ as shown in Figure 4/
DC+ and AC-/GND, i.e. input unit output be direct current when, two terminals of input unit are respectively DC+ and GND, defeated
When enter unit output is alternating current, two terminals of input unit are respectively AC+ and AC-.If in four switching channels, first
Switching channels and second switch channel lead to direct current, hinder alternating current, then the output end of first switch circuit is the ends DC+, second
The output end of switching circuit is the ends GND, i.e. the output end of the output end of first switch circuit and second switch circuit forms direct current
Electricity.Similarly, if third switching channels and the 4th switching channels lead to direct current, alternating current is hindered, then third switching circuit is defeated
Outlet is the ends AC+, and the output end of the 4th switching circuit is the ends AC-, the i.e. output end of third switching circuit and the 4th switching circuit
Output end export direct current.
It is in order to power to power receiving device, then just being needed for the value of the voltage of the output unit output of electric installation for electric installation
Meet the value of the required voltage of power receiving device.Therefore, continuing with referring to Fig. 4, alternating current-direct current switch unit further includes first negative
It carries and the second load, the both ends of the first load is separately connected the output of the output end and second switch circuit of first switch circuit
End so that the value of the voltage of output unit output is the first preset value, wherein the first preset value can be required for power receiving device
Voltage value.The size of first load can be determined according to the first preset value.Wherein, first switch circuit and second switch electricity
Road detection unit output be direct current when be connected.Similarly, the both ends of the second load are separately connected third switching circuit
Output end and the 4th switching circuit output end so that the value of the voltage of output unit output is the second preset value, wherein the
Two preset values can be the value of the required voltage of power receiving device.The size of second load can be determined according to the second preset value.
Wherein, third switching circuit and the 4th switching circuit detection unit output be alternating current when be connected.The utility model is real
It applies in example, the first load and the second load can be realized by resistance.
What detection unit can detect input is alternating current or direct current, in possible embodiment, detection unit
It can be realized by resistance capacitance RC circuits or resistance-inductance-capacitance rlc circuit.Switching circuit may be implemented be connected and disconnect
Function, in possible embodiment, switching circuit can pass through the realizations such as transistor and/or analog switch.Transistor can be
Field-effect tube.In order to make it easy to understand, below just respectively with the realization circuit diagram of direct current electricity output and the reality that exchanges electricity output
How existing circuit diagram introduction realizes the output of direct current and alternating current.
Fig. 5 is referred to, Fig. 5 is the realization circuit diagram of direct current electricity output.Fig. 5 is rlc circuit with detection unit, switch
Circuit is to introduce how to realize output direct current for triode.As shown in figure 5, RLC filters are passed through in input unit output, open
It closes S1 and switch S2 high level is closed, low level disconnects.When DC supply input, RLC filters export high level, switch S1 with open
It closes S2 to be closed, DC+ and GND export DC voltage after the first diode and the first load.When alternating current inputs, RLC filtering
Device output is 0, and switch S1 and switch S2 are disconnected, and DC+ and GND outputs are 0, i.e., do not export direct current.First diode can
To prevent voltage reversal.In Figure 5, the collector of the anode and the first switch circuit in four switching circuits of the first diode
Connection, the cathode of the first diode are connect with one end of the first load, in the other end and four switching circuits of the first load
The collector of second switch circuit connects.
Fig. 6 is referred to, Fig. 6 is the realization circuit diagram for exchanging electricity output.Fig. 6 is rlc circuit with detection unit, switch
Circuit is to introduce how to realize output alternating current for triode.As shown in fig. 6, alternating current-direct current switch unit further includes：Second is negative
Load, the 5th switching circuit S5, the 6th switching circuit S6 and the second diode and third diode.Wherein, the second load so that inspection
When survey unit output is alternating current, the value of the voltage of output unit output is the second preset value.5th switching circuit S5 and
Three switching circuit S3 connections, third switching circuit S3 detection unit export be alternating current when be connected, the 5th switching circuit S5
Collector with second load one end connect.6th switching circuit S6 is connect with the 4th switching circuit S4, the 4th switching circuit
S4 detection unit export be alternating current when be connected, the collector of the 6th switching circuit S6 and second load the other end connect
It connects.Second diode is connect with the 5th switching circuit, and the anode of the second diode is connect with the collector of the 5th switching circuit, the
The cathode of two diodes is connect with the ground level of third switching circuit.Third diode is connect with the 6th switching circuit, wherein the
The anode of three diodes is connect with the input terminal of the 4th switching circuit, the output of the cathode of third diode and the 4th switching circuit
End connection.
In figure 6, equally, third switching circuit S3 and the 4th switching circuit S4 high level are closed, and low level disconnects.5th
Signal the two signals combination control that switching circuit S5 and the 6th switching circuit S6 is exported by power supply signal and RLC filters.
When DC supply input, RLC filters export high level, and third switching circuit S3 and the 4th switching circuit S4 are closed, the 5th switch
Circuit S5 and the 6th switching circuit S6 are disconnected, and AC+ and AC- outputs are 0.When exchange input, RLC exports low level, and third is opened
Powered-down road S3 and the 4th switching circuit S4 are disconnected, when AC power supplies forward direction half period, the switch electricity of the 5th switching circuit S5 and the 6th
Road S6 is closed, and when AC power supplies negative sense half period, the 5th switching circuit S5 and the 6th switching circuit S6 are disconnected, and are connected in parallel on switch
Third diode current flow, therefore realize that the output of AC signals in the complete period, AC+ and AC- are exported after the second load and exchanged
Electricity.
AC+/DC+ and AC-/GND are can be seen that as input according to Fig. 5 and Fig. 6, are exchanged 4 tunnels inside switch unit and are opened
Channel is closed, each way switch channel can detect the AC/DC attribute of input signal, and export the signal of different attribute, switch
The truth table in channel is as shown in table 1.
The truth table of 1 switching channels of table
When can be seen that switching channels 1 and the conducting of switching channels 2 by content as shown in table 1, the defeated of direct current is realized
Go out, when switching channels 3 and switching channels 4 are connected, realizes the output of alternating current.
In general, user is when use is for electric installation, it is possible to attaching plug anti-plug can may result in and be damaged for electric installation
It is bad.For this purpose, the alternating current-direct current switch unit in the utility model embodiment can also include the 7th switching circuit.7th switch electricity
The input terminal on road is connect with the input terminal of first detection unit and second detection unit, the collection of output end and first switch circuit S1
Electrode connects, for input unit two input terminals and DC/AC power supply source output end Opposite direction connection when, output is single
Member can be that power receiving device is powered, i.e., still export direct current.
In order to make it easy to understand, referring to Fig. 7, Fig. 7 is a kind of structural schematic diagram for electric installation inverse plugging.When DC power supply is anti-
When inserting, DC power supply can be exported from the AC of the circuit described in Fig. 5 and Fig. 6, therefore, increase circuit shown in Fig. 7, that is, increase reversed output
The channels DC, while with the output voltage in the channel go control AC output channels input break-make.
In the figure 7, the input terminal of the 7th switching circuit SS and the first detection unit in four detection units and the second inspection
The input terminal connection of unit is surveyed, output end is connect with the collector of first switch circuit S1.When DC power supply anti-plug, believed with DC+
Number the 7th switching circuit SS of shutdown so that AC output par, cs do not work, realize two input terminals in input unit with hand over it is straight
When flowing the output end Opposite direction connection of power supply, output unit can be that power receiving device is powered, i.e., still export direct current.
In the figure 7, since the 7th switching circuit SS has cut-in voltage, so as to cause AC output voltage positive half period from 0V
It opens, voltage will appear the phenomenon that part is ended, and cause AC outputs discontinuous, as shown in Figure 8.Fig. 8 is that AC outputs are discontinuous
A kind of schematic diagram.As can be seen from Figure 8, the local AC outputs of two circle signals are discontinuous in Fig. 8.
In consideration of it, referring to Fig. 9, Fig. 9 is a kind of structural schematic diagram for electric installation inverse plugging.It is defeated that Fig. 9 only illustrates AC-
The principle of the electrical block diagram gone out, AC+ outputs is similar to the principle that AC- is exported, and therefore, the circuit structure of AC+ outputs can
To be analogized with Fig. 9, which is not described herein again.As shown in figure 9, alternating current-direct current switch unit can also include the first phase shifter and the
Two phase shifters.Wherein, the first phase shifter is also referred to as advanced phase shifter, and the second phase shifter also referred to as lags phase shifter.First phase shift
Device is connect with the 4th switching circuit S4 and the 6th switching circuit S6.Second phase shifter and the 4th switching circuit S4 and the 8th switch electricity
Road S8 connections, for input unit export be alternating current when so that alternating current-direct current switch unit can export continuous exchange
Electricity.
In conclusion the utility model embodiment provide for electric installation, PoE, alternating current-direct current, three-in-one confession may be implemented
Electricity can be suitable for plurality of application scenes, more flexibly.
And in electric installation AC24 and DC12 may be implemented to automatically switch so that for electric installation DC12 without flyback
Circuit reduces the difficulty of design circuit of reversed excitation from the input voltage range for reducing circuit of reversed excitation.And DC12 is without flyback electricity
Road, allowing for voltage will not reduce, and electric current will not increase, when so as to solve DC12 inputs, for the member inside electric installation
The problem that the loss of device is big, efficiency is low.
The function that DC power supply inverse plugging may be implemented for electric installation in the utility model embodiment, and utilize advanced phase shift
Device and lag phase shifter solution switching device are caused by cut-in voltage the phenomenon that output par, c cut-off so that AC outputs company
It is continuous.
It is apparent to those skilled in the art that for convenience and simplicity of description, only with above-mentioned each function
The division progress of module, can be as needed and by above-mentioned function distribution by different function moulds for example, in practical application
Block is completed, i.e., the internal structure of device is divided into different function modules, to complete all or part of work(described above
Energy.The specific work process of the system, apparatus, and unit of foregoing description can refer to corresponding in preceding method embodiment
Journey, details are not described herein.
In several embodiments provided by the utility model, it should be understood that disclosed device and method, Ke Yitong
Other modes are crossed to realize.For example, the apparatus embodiments described above are merely exemplary, for example, the module or list
Member division, only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or
Component can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point is shown
The mutual coupling, direct-coupling or communication connection shown or discussed can be by some interfaces, between device or unit
Coupling or communication connection are connect, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
Obviously, those skilled in the art can carry out the utility model various modification and variations without departing from this practicality
Novel spirit and scope.If in this way, these modifications and variations of the present invention belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to include these modifications and variations.
Claims (8)
1. a kind of for electric installation, which is characterized in that including：
Input unit is connected with the output end of external DC/AC power supply source；
The output connection of the output end of output unit, input terminal and circuit of reversed excitation and alternating current-direct current switch unit, output end with by electricity
Device connects, for powering for the power receiving device；
Alternating current-direct current switch unit, input terminal are connect with the output end of the input unit, and output end is defeated with circuit of reversed excitation respectively
Enter end to connect with the input terminal of the output unit, for switching power supply between the circuit of reversed excitation and the output unit；
Wherein, if input unit output is alternating current, output end and the circuit of reversed excitation of the alternating current-direct current switch unit
Input terminal between be connected, if the input unit output be direct current, the output end of the alternating current-direct current switch unit with
It is connected between the input terminal of the output unit；
The circuit of reversed excitation, output end are connect with the input terminal of the output unit, the voltage for converting input.
2. device as described in claim 1, which is characterized in that the alternating current-direct current switch unit includes：
Four detection units, wherein the input terminal of each detection unit in four detection units and the input unit
Output end connection, be alternating current or direct current for detect input unit output；
Four switching circuits, wherein the input terminal of each switching circuit in four switching circuits is correspondingly connected with an institute
The output end for stating detection unit, for the detection unit export be alternating current when, be connected the detection unit with it is described
Connection between circuit of reversed excitation, detection unit output be direct current when, conduction detection unit and the output unit
Between connection.
3. device as claimed in claim 2, which is characterized in that the combination electricity that the detection unit is resistance-inductance-capacitance RLC
Road.
4. device as claimed in claim 3, which is characterized in that each switching circuit be transistor and/or analog switch,
If each switching circuit is transistor, the alternating current-direct current switch unit further includes：
The first diode being connected with each other and the first load so that when what the detection unit exported is direct current, the output
The value of the voltage of unit output is the first preset value；
Wherein, the anode of first diode is connect with the collector of the first switch circuit in four switching circuits,
The cathode of first diode is connect with one end of first load, and the other end of first load is opened with described four
The collector of second switch circuit in powered-down road connects；The first switch circuit and the second switch circuit are described
It is connected when what detection unit exported is direct current.
5. device as claimed in claim 4, which is characterized in that the alternating current-direct current switch unit further includes：
Second load so that detection unit output be alternating current when, the value of the voltage of the output unit output is the
Two preset values；
The 5th switching circuit being connect with the third switching circuit in four switching circuits；Wherein, third switching circuit exists
It is connected when what the detection unit exported is alternating current, one end of the collector of the 5th switching circuit and second load
Connection；
It connect the 6th switching circuit with the 4th switching circuit in four switching circuits；Wherein, the 4th switching circuit is in institute
It is connected when state detection unit output is alternating current, the other end of the collector of the 6th switching circuit and second load
Connection；
Second diode is connect with the 5th switching circuit, wherein the anode of second diode is switched with the described 5th
The collector of circuit connects, and the cathode of second diode is connect with the ground level of the third switching circuit；
Third diode is connect with the 6th switching circuit, wherein the anode of the third diode is switched with the described 4th
The input terminal of circuit connects, and the cathode of the third diode is connect with the output end of the 4th switching circuit.
6. device as claimed in claim 5, which is characterized in that the alternating current-direct current switch unit further includes：
7th switching circuit, the input of input terminal and first detection unit and second detection unit in four detection units
End connection, output end connect with the collector of the first switch circuit, be used for two input terminals in input unit with it is described
When the output end Opposite direction connection of DC/AC power supply source, the output unit can be that the power receiving device is powered.
7. device as claimed in claim 6, which is characterized in that the alternating current-direct current switch unit further includes：First phase shifter and
Second phase shifter；
Wherein, first phase shifter is connect with the 4th switching circuit and the 6th switching circuit, second phase shift
Device is connect with the 4th switching circuit and the 8th switching circuit, for the input unit export be alternating current when, make
Continuous alternating current can be exported by obtaining the alternating current-direct current switch unit.
8. the device as described in claim 5-7 is any, which is characterized in that the input unit includes that first interface and second connect
Mouthful, it is described to further include for electric installation：
Rectifier bridge is connect with the alternating current-direct current switch unit and the circuit of reversed excitation；
Wherein, the input terminal of the first interface is connected with the output end of the DC/AC power supply source, output end with it is described
The input terminal of rectifier bridge connects, and the output end of the rectifier bridge is connect with the input terminal of the circuit of reversed excitation；
The input terminal of the second interface is connect with active Ethernet PoE power supplies, the input of output end and the rectifier bridge
End connection, the output end of the rectifier bridge are connect with the input terminal of the circuit of reversed excitation, for powering for PoE power receiving devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820040776.XU CN207868990U (en) | 2018-01-10 | 2018-01-10 | It is a kind of for electric installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820040776.XU CN207868990U (en) | 2018-01-10 | 2018-01-10 | It is a kind of for electric installation |
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| CN207868990U true CN207868990U (en) | 2018-09-14 |
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| CN201820040776.XU Active CN207868990U (en) | 2018-01-10 | 2018-01-10 | It is a kind of for electric installation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117233647A (en) * | 2023-11-10 | 2023-12-15 | 中关村芯海择优科技有限公司 | AC/DC signal self-adaptive detection circuit and electrical equipment |
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2018
- 2018-01-10 CN CN201820040776.XU patent/CN207868990U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117233647A (en) * | 2023-11-10 | 2023-12-15 | 中关村芯海择优科技有限公司 | AC/DC signal self-adaptive detection circuit and electrical equipment |
| CN117233647B (en) * | 2023-11-10 | 2024-02-20 | 中关村芯海择优科技有限公司 | AC/DC signal self-adaptive detection circuit and electrical equipment |
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